EP 4373218 A1 20240522 - FLICKER ELIMINATION LED DRIVING CIRCUIT AND DRIVING CONTROL METHOD THEREFOR
Title (en)
FLICKER ELIMINATION LED DRIVING CIRCUIT AND DRIVING CONTROL METHOD THEREFOR
Title (de)
LED-TREIBERSCHALTUNG ZUR FLIMMERBESEITIGUNG UND ANSTEUERUNGSVERFAHREN DAFÜR
Title (fr)
CIRCUIT D'ATTAQUE DE DEL À ÉLIMINATION DE PAPILLOTEMENT ET SON PROCÉDÉ DE COMMANDE D'ATTAQUE
Publication
Application
Priority
CN 2022123255 W 20220930
Abstract (en)
An LED driver circuit is used to drive an LED load and to mitigate flicker caused by ripple from mains power. The driver circuit includes: a rectifier bridge set for rectifying the mains power and having at least one set of output terminals; a load branch being capable to be coupled into two different current paths, the load branch including an LED load and LED constant-current controller; and a capacitive branch at least including an input capacitor. With a turn-on voltage of the load branch being taken as a threshold, one of the rectified mains power and the input capacitor is selected as a power source for the load branch. This LED driver circuit is simple in structure, highly reliable and capable of flicker elimination, and has optimized input current harmonic rejection performance that can meet the requirements of various relevant standards.
IPC 8 full level
H05B 45/59 (2022.01); H02M 1/42 (2007.01); H02M 7/00 (2006.01); H05B 45/345 (2020.01); H05B 45/355 (2020.01); H05B 45/395 (2020.01); H05B 45/36 (2020.01)
CPC (source: EP)
H02M 1/12 (2013.01); H02M 1/14 (2013.01); H02M 7/06 (2013.01); H05B 45/00 (2020.01); H05B 45/345 (2020.01); H05B 45/355 (2020.01); H05B 45/395 (2020.01); H05B 45/59 (2022.01); H05B 45/36 (2020.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 22862406 A 20220930; CN 2022123255 W 20220930